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Updated: Sep 27, 2026
Improved Rodent Model of Myocardial Ischemia and Reperfusion Injury
Published on: March 7, 2022
Protective effects of xanthones against myocardial ischemia-reperfusion injury in rats
De-Jian Jiang1, Gui-Shan Tan, Feng Ye
1Department of Pharmacology, School of Pharmaceutic Sciences, Central South University, Changsha 410078, China.
Aim:
To investigate the protective effect of xanthones against myocardial ischemia-reperfusion injury in rats.
Methods:
Ischemia-reperfusion injury was induced by 20 min of global ischemia and 40 min of reperfusion in isolated rat hearts or 60-min coronary artery occlusion and 180-min reperfusion in vivo, respectively. Heart rate, coronary flow, left ventricular pressure (LVP), and its first derivative (+/- dp/dtmax) were recorded, and the activity of creatine kinase in coronary effluent and malondialdehyde contents in myocardial tissues were measured in vitro. The activity of serum creatine kinase and myocardium infarct size were measured in vivo.
Results:
Xanthones (90 or 300 microg/L) caused a significant improvement of cardiac function (LVP and +/- dp/dtmax) and a decrease in the release of creatine kinase in coronary effluent as well as the level of malondialdehyde in myocardial tissues. Xanthones (0.5 or 1.0 mg/kg) also markedly decreased infarct size and the release of creatine kinase in vivo.
Conclusion:
Xanthones protect the myocardium against the damages induced by ischemia-reperfusion in rats, and the effect of xanthones may be related to the inhibition of lipid peroxidation.
